GRADUATE TRAINING PROGRAM

Transcription

1 GRADUATE TRAINING PROGRAM Program Introduction Presented by: Mel O Mara Program and learning manager, AIRAH

2 A new Learning Program AIRAH's new Graduate Training Program is the definitive postgraduate training course for entrants to the HVAC&R industry. Semester 1 Semester 2 Fundamentals Equipment & Components Systems Practice & Performance 30 hours 10 hours 45 hours 15 hours

3 GRADUATE TRAINING Assumes sound understanding of theory but limited exposure to application Provides link with tertiary education to practice Use of common terms and phrases This IS NOT a comprehensive thesis This IS an introduction to key topics, relevant to our local industry

4 Online Learning Platform

5 Learning Outcomes-Chillers General understanding of the heat transfer principle, and the vapour compression cycle Ability to identify different types of chillers, and heat rejection and compressor types Understand the chiller application process Awareness of the key energy parameters applicable to current practice in relation to chillers

6 GRADUATE TRAINING PROGRAM Content Preview: Chillers (as part of the Equipment & Components Unit) Presented by: BRETT FAIRWEATHER +INTEGRITY +INFORMED +INNOVATION

7 1. Introduction TOPIC OUTLINE Chillers 2. Types of Chillers 3. Application 4. Energy

8 SECTION OUTLINE Introduction Heat transfer principle What is a chiller? Chillers and the Vapour Compression Cycle Classifying Chillers

9 SECTION OUTLINE Introduction Heat transfer principle HOT COLD Chilling is really a collection and transfer process What is a chiller? A machine designed to remove heat from water passing through it and transfer this heat to air or water & then out of the building

10 SECTION OUTLINE Introduction Chillers and the Vapour Compression Cycle Translating the P-H diagram from theory to practice (reflecting pressure losses etc) Relating P-H processes lines to chiller components Classifying Chillers by refrigeration cycle & energy source by heat rejection method by type of compressor

11 SECTION OUTLINE Types of Chillers Refrigeration Cycles and Energy Source Heat Rejection Types Compressor Types Other Features

12 SECTION OUTLINE Types of Chillers Refrigeration Cycles and Energy Source Electric VC Absorption Heat Rejection Types Air-cooled chillers Water-cooled chillers

13 SECTION OUTLINE Types of Chillers Compressor Types Scroll Recip Screw Centrif & drive type Other Features Heat exchangers Metering devices (TX vs Electronic vs Float)

14 SECTION OUTLINE Application Do I need a chiller? Which chiller? Collecting heat Heat rejection Variants in application Codes & Standards

15 Do I need a chiller? SECTION OUTLINE Application Need vs Want vs Engineering Entertainment Which chiller? Machinery considerations Environmental conditions Siting Costs

16 Collecting heat SECTION OUTLINE Application Interface with chilled water distribution system Too much flow vs too little flow Heat rejection Air-cooled recirculation issues Interface with CDW Limitations CDW too cold Opportunities efficiencies

17 SECTION OUTLINE Application Variants in Application Oversizing, diversity & matching load profiles Flow rates and temperatures Minimum loop volume Variable flow Reverse Cycle / Heat Pump Operating & maintenance considerations Codes & Standards

18 MEPS COP IPLV & NPLV NCC (Section J) SECTION OUTLINE Energy

19 MEPS SECTION OUTLINE Energy What is MEPS and how is it regulated Identifying registered chillers Identification of limiting COP s & IPLV s NCC (Section J) Prescribed minimum COP s & IPLV s (currently below minimum MEPS) Limiting pumping energy & a chiller s dt selection

20 COP SECTION OUTLINE Energy Basic calcs It s just a quick initial reference IPLV & NPLV Origin & purpose Reinforce use & application Example of % load vs efficiency Example of % load vs kw input

21 Thank you For more information on the Graduate Training Program: Mel O Mara Program and learning manager, AIRAH mel@airah.org.au (03) Presented by: BRETT FAIRWEATHER +INTEGRITY +INFORMED +INNOVATION